51. The Internal Constitution of the Stars
by Eddington, Arthur S. 
Price: USD 55.00
Dealer: Abebooks, Bingo Used Books
Description: ISBN10: 0521337089, ISBN13: 9780521337083, [publisher: Spain: Cambridge Univ Pr] Softcover Trade paperback in good condition. Some margin notes and a little highlighting. [Vancouver, WA, U.S.A.] [Publication Year: 1988]  

52. The Internal Constitution of the Stars
by Eddington, Arthur S. 
Price: USD 17.40
Dealer: Abebooks, ThriftBooks-Atlanta
Description: ISBN10: 0521337089, ISBN13: 9780521337083, [publisher: Cambridge University Press] Softcover Pages can have notes/highlighting. Spine may show signs of wear. ~ ThriftBooks: Read More, Spend Less 1 [AUSTELL, GA, U.S.A.] [Publication Year: 1988]  

53. The Internal Constitution of the Stars
by Eddington, Arthur S. 
Price: USD 14.66
Dealer: ZVAB, Better World Books
Description: ISBN10: 0521337089, ISBN13: 9780521337083, [publisher: Cambridge University Press] Softcover Former library book; may include library markings. Used book that is in clean, average condition without any missing pages. [Mishawaka, IN, U.S.A.] [Publication Year: 1988]  

54. THE INTERNAL CONSTITUTION OF THE
by Eddington, Arthur S. 
Price: USD 76.20
Dealer: Abebooks, BennettBooksLtd
Description: ISBN10: 0521337089, ISBN13: 9780521337083, [publisher: Cambridge University Press] Softcover New. In shrink wrap. Looks like an interesting title! 1.41 [North Las Vegas, NV, U.S.A.] [Publication Year: 1988]